Add misc/msvc12/ to support Microsoft Visual Studio 2012 Express Edition
Merge pull request #63 from kungfooman/visualstudio

Add misc/msvc11/ to support Microsoft Visual Studio 2012 Express Edition
Add MSVC SDL 1.2.15 Revision 8040 import libs
OpenGL2: Remove sRGB support, replace with gamma cvars.
Rebuilt MSVC SDL 1.2.15 Revision 8040 import libs